Mike Perry announced the release of , which is based on Firefox ESR 31.7.0 and features important security updates to Firefox. Tor Browser 4.5.2 provides a fix for the Logjam attack and updates a number of Tor Browser components: Tor to version 0.2.6.9, Torbutton to version 18.104.22.168, NoScript to version 22.214.171.124 and HTTPS-Everywhere to version 5.0.5. Moreover, it fixes a possible crash on Linux and avoids breaking the Add-ons page if Torbutton is disabled.
Install by using the following PPA.
sudo add-apt-repository ppa:webupd8team/tor-browser
sudo apt-get update
sudo apt-get install tor-browser